Dampening-machine for printing-presses



(No Model.)

W. SCOTT. f DAMPENING MACHINE FOR PRINTING PRESSES. No..325,867.Patented Sept. 8, 1885.

UNITED STATES PATENT Orricnt WALTER SCOTT, OF PLAINFIELD, NEW JERSEY.

DAMPENlNG-MACHlNE FOR PRINTING-PRESSES.

.5PECIFICATION forming part of Letters Patent NO. 325,867, datedSeptember 8, 1885.

' v application filed February 24, 1885. (No model.)

To ctZZ whom it may concern.-

Be it known that I, WALTER Scorcr, of Ilainfield, in the county of Unionand State of New Jersey, have invented an Improvement in Dampening-Machines for Printing- Presses, of which the following is aspecification.

Machines have heretofore been made in which the web of paper from a rollis passed over a convex surface, or over a driving-drum, where it isexposed to a spray of moisture di rected downwardly upon the paper, andfrom this convex table or roller the paper passes to a shaft, upon whichit is wound.

In machines of this construction the roll of paper, as it is wound uponthe shaft, bears with more or less force, according to its weight, uponthe drum, and it sometimes happens that the paper is more'solid at oneplace than it is at another as the damp paper is wound up in a roll;hence the more solid portion of the roll of paper, as it comes incontact with the winding-drum, lifts the roll of paper and its shaft,and these fall again when a less solid portion of the paper restsagainst the winding-drum. The consequence of this is,t-hat the roll ofpaper vibrates up and down or wabbles, and this inequality is augmentedby the paper as it iswound upon the roll, and the paper winds crookedand sometimes creases.

The object of my invention is to prevent the jumping or vibrating actionof the roll of paper as it is wound, and also to adjust the windingshaft or roller in its relation to the winding-drum, so that the actionin winding the paper will be true and uniform.

In the drawings, Figure 1 is a side elevation of the dampeningapparatus. Fig. 2 is a plan of the same at one end of the winding drumand roller. Fig. 3 is a section through the bearing-box for the journalof the winding roller. Fig. 4 is an elevation of the winding apparatuswith sliding bearings for the winding-roller.

A represents a frame of suitable character, upon which are bearings Bfor the shaft of a roll of paper, 0.

D is a winding-drum, over which the paper is passed, and which drum isrotated by competent power and gives motion to the paper in drawing thesame along and in wind- E represents the spray-nozzle or atomizingdevice, by which the water or other dampening-liquid is scattereduniformly upon the surface of the paper.

F represents a roller, upon which the paper is wound after beingdampened. t is one journal of the roller-in a journal-box, H; and K is astock, to which two, three, or more pawls, Z, are pivoted, and M is arack of teeth 1nto which such pawls Z catch.

It is to be understood that there is a box, a

ing-roller F is drawn toward the winding-drum D; but I prefer to formthe stocks at the ends of arms N, that project from the crossshaft 0 inbearings 0 upon the frame A. In

this case the weight Q, will be upon a leverarm, S, that projects fromthe shaft 0.

The pawls Z are to be placed in such a relation to each other and to therack M that all the points of the pawls are not simultaneously incontact with the teeth of the rack; for instance, the end pawl may be incontact with a tooth, the end of the next pawl may be distant one-thirdof the width of a tooth, and the third pawl may be distant two-thirdsthe width of a tooth; hence the pawls will drop in succession and holdagainst their respective teeth, thereby dividing up the action of thepawls, and rendering it unnecessary to have the ratchetteeth very fine.

As the winding of the paper progresses upon the roller F, such roller ismoved away from the winding-drum by the intervening paper, and the pawlscatch and hold in succession upon lthe rack M. If the paper is thickeror more solid "at one place upon the winding-roller than at another, thewindingroller will be moved back by the thicker or more solid portion ofthe paper, and will be held by the pawls, so that the roller F will notmove toward the winding-drum when the ing it up.

paper which intervenes is either softer or thinner. Thus the windingaction will be equalized and the web of paper be wound straight, and thewinding-roller F will be held from vibrating toward the drum D.

Either one or both of the journal-boxes H are made with dovetailedslides at their back edges, which slides are received into corresponding recesses in the stocks K, and each journal-box is provided witha screw, It, passing through a projection upon the stock K into thejournal-boxes H, so that the said boxes H can be adjusted to bring theshaft and journal 13 of the roller F perfectly parallel totheshaftofthewinding-drumD. Thisprevents the paper being pressed moreclosely at one edge of the sheet than at the other, and insures auniform action in winding the sheet.

I prefer to connect the pawls Z together by cords or chains t, and toconnect thereto the handle t, so that upon pulling the handle upwardlyout of a socket, into which the inner end is received, the pawls willall be liberated, and the parts will be freed, so that the arms NandshaftO may be turned to give facility for commencing the windingoperation.

I claim as my invention 1. The combination,with the winding-drum D andwinding-roller F, of the journal-boxes H, stock K, pawl Z, and rack M,substantially as set forth.

2. The combination,with the winding-drum D and Winding-roller F, journalboxes H,

, stock K, and rack M, of two or more pawls pivoted upon the stock, andcatching successivel y upon the rack-teeth, substantially as set forth.

3. The combination,with the winding-drum D,winding-roller F,journalboxes H, arms N, and cross-shaft O, of the stocks K, rack M, thepawls Z upon the stocks, the cords or chains t, and handle 16, wherebythe pawls can be all lifted together, substantially as specified.

4. The conibinatiomwith the winding-drum D and windingroller'F, of, thearms N, the cross-shaft O, to which said arms are rigidly connected, andthe journal-boxes H, for the winding-roller F,0ne of which is adjustablein a direction at right angles to one arm N, substantially as specified.

5. The combinatiomwith the winding'drum D and windingroller F, of armsN, a crossshalt, O, to which said arms are rigidly connected, thejournal-boxes H for the winding-roller F, one of which is constructedwith a dovetail which fits a corresponding slot in the stock K at theend of one arm N, and the screw R, to adjust said journal-box in adirection at right angles to one arm N, so as to give an equal pressureupon the paper as it is wound, substantially as specified.

Signed by me this'20th day of February, A. D. 1885.

XVALTER SCOTT. Vitnesses:

GEO. T. PINOKNEY, WALLAcn L. SERRELL.

